OPA2111 Datasheet, PDF (1/13 Pages) Burr-Brown (TI) – Dual Low Noise Precision Difet OPERATIONAL AMPLIFIER

®
OPA2111
Dual Low Noise Precision
Difet ^® OPERATIONAL AMPLIFIER
FEATURES
q LOW NOISE: 100% Tested, 8nV/√Hz max at
10kHz
q LOW BIAS CURRENT: 4pA max
q LOW OFFSET: 500µV max
q LOW DRIFT: 2.8µV/°C
q HIGH OPEN-LOOP GAIN: 114dB min
q HIGH COMMON-MODE REJECTION:
96dB min
APPLICATIONS
q PRECISION INSTRUMENTATION
q DATA ACQUISITION
q TEST EQUIPMENT
q PROFESSIONAL AUDIO EQUIPMENT
q MEDICAL EQUIPMENT
q DETECTOR ARRAYS
DESCRIPTION
The OPA2111 is a high precision monolithic
dielectrically isolated FET (Difet ) operational ampli-
fier. Outstanding performance characteristics allow its
use in the most critical instrumentation applications.
Noise, bias current, voltage offset, drift, open-loop
gain, common-mode rejection, and power supply re-
jection are superior to BIFET^® amplifiers.
Very low bias current is obtained by dielectric isola-
tion with on-chip guarding.
Laser trimming of thin-film resistors gives very low
offset and drift. Extremely low noise is achieved with
patented circuit design techniques. A cascode design
allows high precision input specifications and reduced
susceptibility to flicker noise.
Standard dual op amp pin configuration allows up-
grading of existing designs to higher performance
levels.
BIFET^® National Semiconductor Corp., Difet^® Burr-Brown Corp.
+V_CC
8
–In
+In
Noise-Free
Cascode*
Output
*Patented
OPA2111 Simplified Circuit
(Each Amplifier)
–V_CC
4
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
© 1984 Burr-Brown Corporation
PDS-540E
Printed in U.S.A. October, 1993